According to TMZ, Brown “was blocked by Frank Ocean and his crew’ when Ocean allegedly told 23-year-old Brown, “This is my studio, this is my parking spot.”

It’s claimed that “one of Frank’s people” then attacked Brown as he attempted to shake hands with Ocean and that one of Brown’s friends then “jumped in front” of the two men and hit Ocean on the head, Yahoo News reports.

Although police were called to the scene, Brown had already left the studio by the time they arrived. Officers reportedly spoke to Ocean, but, as yet, no arrests or charges have been made.

Unsurprisingly, Ocean’s version of events is slightly different to Brown’s camp.

On Sunday, the 25-year-old “Sweetlife” singer spoke out about the incident and posted two messages on his Twitter account, writing:

“Got jumped by Chris and a couple guys. lol.. I only wish everest was there.”

Ocean added:

“Cut my hand now I can’t play with two hands at the grammys.”

This is not the first time that Brown and Ocean have been involved in conflict.

In June 2011, the two men went at it on Twitter over comments made about the way Brown looked. Then last July, Brown was forced to clarify allegations that he had made a homophobic remark about Ocean after the Channel Orange singer came out on his blog on July 4.

Brown subsequently denied making any such comments and posted a message on Twitter, writing:

This latest incident between Ocean and Brown comes after Brown’s infamous June 14, 2012 row with members of rapper Drake’s entourage at New York City’s “WIP” nightclub.

Despite this, Brown has reportedly been attempting to clean-up his public image in the wake of his assault on Rihanna on the eve of the 2009 Grammy Awards. The couple have since reconciled and even performed together on Rihanna’s latest album Apologetic.

As for Ocean’s upcoming performance at the 2013 Grammy’s— he is nominated for six awards — lets hope his hand heals in time.